Kissing On The Mouth -

: A deep kiss engages up to 24 facial muscles , which can help tone the face and neck. History and Cultural Context

: A passionate kiss can transfer approximately 80 million bacteria , acting like a "probiotic" that strengthens the immune system. Kissing on the Mouth

: Recent research suggests that if both great apes and humans kiss, their last shared ancestor —living roughly 21 million years ago—likely did as well. : A deep kiss engages up to 24

Explore the biological, evolutionary, and social reasons why humans engage in kissing: Why Do We Kiss? YouTube · BuzzFeedVideo The ancient origins of kissing - BBC World Service YouTube · BBC World Service Is Kissing Good For You? | What's Up Docs? YouTube · BBC Sounds Explore the biological, evolutionary, and social reasons why

: A first kiss can act as a "litmus test" for a relationship. Through saliva exchange, individuals can subconsciously pick up on hormonal and immune system signals that help determine long-term compatibility. Health Benefits :